Linear weld seam with high load capacity and process for production
a weld seam and high load technology, applied in the direction of laser beam welding apparatus, workpiece edge portions, manufacturing tools, etc., can solve the problems of high load on weld seams, and achieve the effect of high precision, rapid and flexible beam deflection device, and durable connection
Inactive Publication Date: 2006-03-23
DAIMLER AG
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Benefits of technology
[0016] It is particularly advantageous when the laser beam is moved over the surface by means of a scanner device. A scanner device is a particularly rapid and flexible beam deflection device, for example a mirror system (of at least one single- or multi-axis controllable pivotable mirror) or alternatively acusto-optic modulators. Thereby, the time required for repositioning of the laser beam during the introduction of the discontinuities disappears almost completely. Therewith, a highly efficient utilization of the laser system is made possible.
Problems solved by technology
Such linear weld seams, however, are not able to endure high loads.
Method used
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Embodiment Construction
[0026] According to a first illustrative embodiment, over a longer period of time a large number of respectively two sheets of steel to be joined to each other are joined by means of a laser scanner with a straight weld seam of 20 mm length and respectively subject to a series of various loads, until a break in the weld seam occurs. The progression of the weld seam break is observed and the location of the initiation of the weld seam breakage is respectively determined. By means of a statistical evaluation the most frequently occurring location is determined. This location is considered to be the empirically determined location with the highest probability of a weld seam breakage.
[0027] According to this first illustrative embodiment, one end of the weld seam is determined as being the location with the highest probability of a weld seam breakage.
[0028] Two similar steel sheets to be joined to each other are joined by means of a laser scanner with the same weld seam of 20 mm lengt...
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Abstract
For increasing the load bearing capacity of spot-like weld seams for producing a durable joint between at least two components, it is known to lengthen this linearly, that is, to weld with a longitudinal orientation extending more than 30 mm. Such linear weld seams, however, do not endure high loads. The task of the present invention comprises providing linear weld seams with increased load bearing capacity and a process for their production. This task is solved by a process specifically for increasing the load bearing capacity of a linear weld seam for producing a durable joint between at least two components, wherein the location with the highest probability of a weld seam break is determined and then, at this location, a discontinuity is introduced into the weld seam, in such a manner that the tangent of the connecting line exhibits an angle of 15° or more.
Description
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The invention concerns a linear weld seam with high load capacity or toughness, and a process for production thereof. [0003] 2. Related Art of the Invention [0004] For increasing the load capacity or toughness of spot weld seams in order to produce a durable connection between at least two components, it is known to lengthen these linearly, that is, to extend the length of the weld to more than 30 mm. Such linear weld seams, however, are not able to endure high loads. SUMMARY OF THE INVENTION [0005] The task of the present invention concerns the providing of linear weld seams which are capable of accepting high load and a process for their production. [0006] The invention is set forth in greater detail below with regard to the process to be provided and with regard to the weld seam to be provided. [0007] With regard to the process to be provided for the targeted increase in the load bearing ability or toughness of a...
Claims
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Login to View More IPC IPC(8): B23K26/00
CPCB23K26/03B23K33/004B23K26/24
Inventor BECKER, WOLFGANGBUEHLER, JENSGOTH, KLAUSREINIGER, CLAUS-DIETERZAUNER, DANIEL
Owner DAIMLER AG